On pascal (randomhash): hashrate decrease on windows on a 7960x (16 cores, 32 threads)  with all 32 threads: from above 3500h/s to lower than 3000. To avoid this problem, I need to limit to 24-26 threads, with around 3200h/s.

With rhmininer with 32 threads, I am at around 3100 h/s.
So far, your miner is better: 3200h/s with 24 threads, 175w, instead of 3100 at 200w with rhminer.

But maybe you can manage to solve the problem of hashrate decrease at 32 threads, with a stable 3500 h/s.